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You're a mobile kind of worker. Sometimes you get a question that you have to go to a different room to answer, which means your caller is sitting on hold for a long time. Wouldn't it be nice if you could transfer the call and pick it up at your new location?
Yes, it would, and you can. Asterisk has 20 reserved parking slots, 701–720. Activate parking by adding the parkedcalls context to your desired internal context, such as the [local-users] context used in this chapter: